(57) A machine (10) that takes screws (39) out of a hopper (32) and delivers them to a
screw driving station where they are driven by motor operated screw driver members
(24) to secure a hinge to a door and a jamb. Inside the hopper (32), a screw lifting
member (36) engages, lifts, aligns and delivers individual screws (39) to a hopper
discharge station (39b). Pressurized air blows the screws (39) from their respective
discharge stations (39b) onto tracks (35), there being one track (35) associated with
each discharge station (39b). Elongate transfer tubes (34) positioned at the discharge
end of the tracks (35) deliver the screws (39) to a movable head member (21) which
upon receiving a charge of screw members (39) moves downwardly and inwardly to a fixed
position screw driving station where a door and jamb are positioned. Screw driver
members (24) are brought into driving relation to associated screws (39) by horizontally
inward movement of a motor (26) that rotates the screw driver members (24). The downward
and inward stroke separates the head member (21) from the transfer tubes (34) and
a subsequent return stroke returns the head member (21) to the discharge end of the
transfer tubes (34) so that another set of screw members (39) may be charged into
the head member (21). Accordingly, the transfer tubes (34) do not move during machine
operation.
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